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An underground coal gasification process system

An underground gasification and process system technology, applied in coal gasification, underground mining, construction, etc., can solve the problems of difficult to control the gasification process stably, low gasification efficiency, narrow gasification area, etc., to increase gasification coal reserves , the effect of increasing gasification coal reserves and expanding gasification area

Inactive Publication Date: 2017-01-04
北京中矿科能煤炭地下气化技术研究中心
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of narrow gasification area, low gasification efficiency, difficult stable control of the gasification process and difficult and unsafe ignition in the wellless underground coal gasification process, and propose an underground coal gasification process system

Method used

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  • An underground coal gasification process system
  • An underground coal gasification process system
  • An underground coal gasification process system

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Embodiment

[0039] An embodiment of an underground coal gasification process system, such as Figures 1 to 10 As shown, the underground gasification system includes a gasification agent injection borehole 1, a gas outlet borehole 2, a main gasification channel 3, a branch gasification channel 5, a borehole support pipe 8, a gasification agent injection pipe 9, and a combustion agent Injection tube 10, sealing device 11 and ignition point shifting device 12. Such as figure 1As shown, the gasification agent injection borehole 1 and the gas outlet borehole 2 are drilled vertically into the coal seam until the bottom of the desired gasification coal seam; one end of the main gasification channel 3 is connected to the gasification agent injection borehole 1, and the other is One end is divided into two branch gasification passages 5, and the other ends of the two branch gasification passages 5 are respectively connected to a gas outlet borehole 2 to form a gasification unit; Figure 5 As sh...

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Abstract

The invention relates to a coal underground gasification process system. The coal underground gasification process system comprises a gasification agent injection drill hole, coal gas outlet drill holes, a main gasification channel, branch gasification channels, a drill hole supporting tube, a gasification agent injection tube, a combustion agent injection tube, a sealing device and an ignition point shifter. The gasification agent injection drill hole is connected with the coal gas outlet drill holes through the main gasification channel and the branch gasification channels, and the combustion agent injection tube is sleeved with the gasification agent injection tube and is connected through the sealing device. A gasification process includes the steps of carrying out ignition, judging whether water vapor is fed into, feeding into water vapor, judging whether an ignition point is moved forward, starting the ignition point shifter and continuing to conduct combustion. The coal underground gasification process system has the advantages that the transverse gasification area and longitudinal gasification area can be enlarged, coal reserves for gasification are increased, autoignition and controllable back gas injection are achieved in a well-free coal underground gasification process, meanwhile the problem of short circuit of gasification agents in the gasification channels is solved, the probability of back mixing of product gas and the gasification agents is lowered, and safety operation of the gasification process is guaranteed.

Description

technical field [0001] The invention relates to the field of underground coal gasification production, in particular to an underground coal gasification process system. Background technique [0002] Underground coal gasification technology can recover coal resources that cannot be mined manually and are uneconomical, and people have already started researching them very early. Coal underground gasification is divided into well type and non-well type. The well type uses the existing roadway to carry out the underground gasification process. The Chinese patent of publication number CN101315026B "A kind of underground coal gasification system and its production process", publication number CN1169501A The Chinese patent "Underground Coal Gasification with Long Channel and Large Cross-section in Mine" and the Chinese patent "A Gas Injection Device with Backward Gas Injection Point in Underground Gasification System" with publication number CN201310327035.1 are all well-type under...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/295
Inventor 吴骏杰樊芳杜庆亮张勇刚
Owner 北京中矿科能煤炭地下气化技术研究中心
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